如何使用img标记和css和类而不是src属性显示图像

I have to set the image of an img tag from the css. This is because both the company requirement and the class in the img tag changes dynamically. So, the following is my code for the img tag and the accompanying css. Since I am using Kendo UI, the values for class and title will be set from a webserviceI have to set the image of an img tag from the